Apparatus for silvering glass plates.



M. GLASER & B. WAINBLATT. APPARATUS FOR SILVERING GLASS PLATES.

APPLICATION FILED JUNE 18, 1 908.

Patented Mar. 15,1910.

UNITED STATES PATENT OFFICE.

MANUEL GLASER AND BANY WAINBLATT, OF NEW YORK, N. Y., ASSIGNORS, BY

MESNE ASSIGNMENTS, TO AMERICAN LOOKING-GLASS 00.,

CORPORATION OF NEW YORK.

on NEW YORK, N. Y., A

APPARATUS FOR SILVERING GLASS PLATES.

To all whom it may concern:

Be it known that we, MANUEL GLASER and BANY \VAINBLATT, both subjects ofthe Czar of Russia, residing at New York, in the borough of Manhattan,county and State of New York, have invented certainnew andusefulImprovements in Apparatus for Silvering Glass Plates, of which thefollowing is a specification.

This invention relates to an improved apparatus for silvering glassplates by suspending a plurality of plates in upright position at thesame time in the silvering so lution, instead of depositing the layer onthe plates individually while in horizontal position; and the inventionconsists of an apparatus for silvering glass-plates which comprises anexterior tank for the silvering solution and a removable f'ame-box provided with transverse handlebars at the upper part, an open top, framedbottom and vertical guide-grooves in the side-walls of the frame-box forinserting a number of glass-plates transversely thereto, so that all theplates are submerged at one time into the silvering solution tank andremoved together after the silvering layer is deposited thereon.

In the accompanying drawings, Figure 1 represents a perspective view ofour improved apparatus for silvering glass-plates, Fig. 2 is a verticaltransverse section through the frame-box for receiving the glass-plates,on line 2, 2, Fig. 1, Fig. 3 is a horizontal section on line 3, 8, Fig.1, and Fig. 4 is a vertical section on line 4i, i, Fig. 2, through thetank and frame-box.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, a represents a waterproof tank which is madeof wood, metal or other suitable material. The tank is preferably madeof rectangular shape, and filled with a solution of the silveringcom-pound, any approved silvering material being employed. A frame-box 0is supported in the tank a and in the frame-box are inserted a pluralityof glass-plates b which after the backs have been polished, cleaned,chemically washed and treated with chlorid of tin are submerged for therequired length of time in the silvering solution until a uniform layeris formed on the prepared rear-surface of the glass- Specification ofLetters Patent.

Application filed June 18, 1908.

Patented Mar. 15, 1910.

Serial No. 439,158.

plates. No coating or very little, is deposited on the face side of theglass, because the glass has purposely not been sufficiently cleaned. Ifany deposit at all is made, it can be easily washed off. The frame-box cis composed of a framed-bottom 0 verticallygrooved parallel sidewalls 0in which the glass-plates are sup ported and transverse handlebars cwhich are attached to the upper ends of uprights c that are attached tothe bottom and sidewalls, the handle-bars forming at the same time thetransverse connection for the sidewalls of the frame-box.

The frame-box, containing the glassplates inserted in the same, is takenhold of by two men at the handles, lifted and then lowered into the tanka until the glass-plates to be silvered after their backs have beenpolished, cleaned and chemically washed, are entirely submerged in thesilvering solution. The glass-plates remain in the solution until thesilver has coated evenly the rear surfaces of the glass-plates, afterwhich the frame-box is removed by lifting it out of the tank by means ofthe handles, so as to allow the solution to flow off after which thesilvered plates are permitted to dry. To the upper edges of theside-walls of the frame 0 are attached cleats (Z which allow theframebox to rest on the opposite upper edges of the tank a and supportit in position so that the solution can readily pass along up both sidesfrom the bottom upward in the space between the glass-plates andframe-box and surround the same entirely. The glassplates remain in thesolution until they have received an even deposit of silver on theirrear surfaces. As any number of plates can be inserted at the same timeaccording to the. sizes of tank and frame-box, the process of silveringis considerably facilitated, expedited and cheapened as the handling ofeach individual glassplate in silvering the same is done away with.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent:

In an apparatus for silvering glass plates, the combination of a tankfor receiving the silvering solution and a glassplate supportingframe-box consisting of a rectangular bottom frame, upright piecessecured to the corners of said bottom frame and extending upwardly abovethe upper edges of said tank, oppositely-disposed inwardly-groovedvertical side-Walls secured upon opposite edges of said bottom frame andbetween the j adjacent upright pieces not connected by said cleats.

In testimony, that We claim the foregoing as our invention, We havesigned our names 15 in presence of two subscribing witnesses.

MANUEL GLASER. BANY WVAINBLATT.

lVitnesses PAUL GOEPEL, HENRY J. Smmmnn.

